Mercury/MerCruiser 5.0L, 5.7L, 350 MAG, Black Scorpion & 6.2L Oil Change Kit

This Mercury/MerCruiser oil change kit is designed for select 5.0L, 5.7L, 350 MAG, Black Scorpion, and 6.2L four-stroke marine engines from 2002-current. It includes Mercury 25W-40 Synthetic Blend Marine Engine Oil and a genuine Mercury oil filter to support proper lubrication, corrosion protection, and reliable performance in demanding marine conditions.

A MerCruiser 350 MAG MPI typically uses Mercury or Quicksilver 25W-40 marine engine oil, often synthetic blend, with capacity depending on model year and configuration. Many engines take roughly 4.5–5 quarts with a filter change, but the dipstick should confirm the final level.

A 5.7 MerCruiser commonly uses Mercury or Quicksilver 25W-40 marine engine oil for protection against corrosion, high load, and marine operating temperatures. Oil capacity varies by model, but many 5.7L engines take about 4.5–5.5 quarts with a filter change.

Kit Includes

• 1 gallon + 1 quart of Mercury 25W-40 Synthetic Blend Marine Engine Oil
• 1 × Mercury Oil Filter 35-866340K01

The amount of oil included in this kit is adequate for most of the specifically noted Mercury and MerCruiser models. If your particular engine requires additional oil, please be sure to purchase this separately.

Mercury 25W-40 Synthetic Blend Marine Oil

For use in many 4-stroke marine engines, Mercury 25W-40 Synthetic Blend oil is engineering approved for marine 4-stroke applications, including outboard, MerCruiser, high-performance, sterndrive, and inboard applications where specified. It exceeds marine industry 4-stroke oil requirements, including FC-W compatibility.

Mercury's 4-stroke oil technology outperforms automotive oils in marine applications because of its specialized additive package designed for marine engines. Marine engines face moisture, corrosion, heavy load, high operating temperatures, and long high-RPM runs, so using the correct marine-rated oil is important.

How to Use This Oil Change Kit

1. Warm the engine briefly so the oil drains or extracts more easily.
2. Drain or extract the old oil into an approved container.
3. Remove the old oil filter and confirm the old gasket came off with it.
4. Install the included Mercury 35-866340K01 oil filter.
5. Refill gradually with Mercury 25W-40 Synthetic Blend Marine Oil.
6. Run the engine briefly, check for leaks, let the oil settle, and confirm the final level with the dipstick.

Always confirm your exact oil capacity, oil type, filter part number, and torque specifications in your Mercury or MerCruiser owner’s manual before service.

Optional Add-On: Oil Analysis

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Frequently Asked Questions

What oil does a MerCruiser 350 MAG MPI take?

A MerCruiser 350 MAG MPI typically uses Mercury or Quicksilver 25W-40 marine engine oil, often synthetic blend, where specified by the owner’s manual. Capacity depends on model year and configuration, so fill gradually and confirm the final level with the dipstick.

How much oil does a MerCruiser 350 MAG MPI take?

Many MerCruiser 350 MAG MPI engines take roughly 4.5–5 quarts with a filter change, but capacity can vary by model year, oil pan, and configuration. Always use the dipstick as the final check after running the engine briefly.

What oil does a 5.7 MerCruiser use?

A 5.7 MerCruiser commonly uses Mercury or Quicksilver 25W-40 marine engine oil for protection against corrosion, high load, and marine operating temperatures. Confirm the exact viscosity and specification in your engine manual.

How much oil does a 5.7 MerCruiser take?

Oil capacity varies by model, but many 5.7L MerCruiser engines take about 4.5–5.5 quarts with a filter change. Add oil gradually, run the engine briefly, and recheck the dipstick before topping off.

Can this kit be used on an Indmar 5.7L engine?

This kit is intended for compatible Mercury and MerCruiser applications, not Indmar engines. Most Indmar 5.7L marine engines take about 5–5.5 US quarts of oil with a filter change, though some performance versions may require closer to 6 quarts. Use the oil and filter specified for the exact Indmar engine model.

Why use marine oil instead of automotive oil?

Marine oil is formulated for moisture, corrosion exposure, high load, and sustained marine operating temperatures. Automotive oil is not designed for the same operating environment as a MerCruiser or other marine engine.